WAC 314-20-090
WAC 314-20-090. Cash sales
No beer distributor nor brewer or beer importer holding a beer distributor's license shall sell or deliver beer to any retailer except for cash paid at the time of the delivery. Cash may be paid prior to the delivery of beer sold to any retailer. Failure by licensees to keep accurate accounting records which result in the extension of credit, in violation of RCW 66.28.010 through the use of a prior cash deposit which is overextended may result in administrative action being taken against the liquor license.